MQ Multiquip MS-93 User manual

OPERATION AND PARTS MANUAL

Revision #5 (03/26/10)

THIS MANUAL MUST ACCOMPANY

THE EQUIPMENT AT ALL TIMES.

MODEL MS-93

PLASTER AND MORTAR MIXER

(GASOLINE ENGINE/ELECTRIC MOTOR)

PAGE 2 — STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10)

Engine exhaust and some of

its constituents, and some dust created

of California to cause cancer, birth

defects and other reproductive harm.

by power sanding, sawing, grinding,

drillingandotherconstructionactivities

contains chemicals known to the State

Some examples of these chemicals are:

Leadfromlead-basedpaints.

Crystallinesilicafrombricks.

Cementandothermasonryproducts.

Arsenicandchromiumfromchemically

treatedlumber.

Your risk from these exposures varies,

dependingonhowoftenyoudothistype

of work. To reduce your exposure to

these chemicals: work in aALWAYS

well ventilated area, and work with

approved safety equipment, such as

dust masks that are specially designed

to filter out microscopic particles.

STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10) — PAGE 3

HERE'S HOW TO GET HELP

PLEASE HAVE THE MODEL AND SERIAL

NUMBER ON-HAND WHEN CALLING

STOW MAIN OFFICE

Post Ofﬁce Box 6254 888-252-STOW

Carson, Ca 90749 FAX: 310-537-1986

Email: stow@multiquip.com

Internet: www.stowmfg.com

PARTS DEPARTMENT

800-427-1244 FAX: 800-672-7877

310-537-3700 FAX: 310-637-3284

SERVICE DEPARTMENT

800-421-1244 FAX: 310-537-4259

310-537-3700

TECHNICAL ASSISTANCE

800-478-1244 FAX: 310-631-5032

WARRANTY DEPARTMENT

800-421-1244, EXT. 279 FAX: 310-537-1173

310-537-3700, EXT. 279

SALES DEPARTMENT

310-661-4242 FAX: 310-604-9237

877-289-7869 (877-BUY-STOW)

STOW Construction Equipment and the STOW logo are registered trademarks of STOW and may not be used, reproduced, or

altered without written permission. All other trademarks are the property of thier respective owners and used with permission.

This manual MUST accompany the equipment at all times. This manual is considered a permanent part of the equipment and

should remain with the unit if resold.

The information and speciﬁcations included in this publication were in effect at the time of approval for printing. Illustrations are

based on the MS-93 Plaster/Mortar Mixer. STOW Construction Equipment reserves the right to discontinue or change speciﬁ-

cations, design or the information published in this publication at any time without notice and without incurring any obligations.

To ﬁnd the latest revision of this

publication, visit our website at:

www.stowmfg.com

PAGE 4 — STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10)

STOW MS-93 PLASTER/MORTAR MIXER — TABLE OF CONTENTS

Specifications and are

subject to change without

notice

.

STOW — Plaster/Mortar Mixer

Here's How To Get Help ...........................................3

Table Of Contents ..................................................... 4

Parts Ordering Procedures .......................................5

Speciﬁcations ........................................................... 6

Dimensions ............................................................... 7

Safety Messages Alert Symbols ............................8-9

Rules For Safe Operation ..................................10-11

Towing Guidelines ...................................................12

Safety Chain Connection ........................................13

Operation and Safey Decals ...................................14

General Information ................................................15

Basic Mixer Components .......................................16

Basic Engine Components .................................... 17

Electric Motor ....................................................18-19

Paddle Blade Adjustment ....................................... 20

Inspection ..........................................................21-22

Start-up Procedures ..........................................22-24

Operation and Shut-Down ......................................25

Maintenance (Engine) .......................................26-27

Maintenance (Mixer) ..........................................28-32

Troubleshooting (Engine) ...................................33-34

Troubleshooting (Mixer/Electric Motor) ................... 35

Electric Motor Wiring Diagram ................................ 36

Explanation of Code In Remarks Column .............. 38

Suggested Spare Parts ..........................................39

HONDA GX240K1HA2 EN-

GINE

Air Cleaner Assembly ........................................58-59

Camshaft Assembly ...........................................60-61

Carburetor Assembly .........................................62-63

Control Assembly ..............................................64-65

Crankcase Cover Assembly ..............................66-67

Crankshaft Assembly .........................................68-69

Cylinder Barrel Assembly ..................................70-71

Cylinder Head Assembly ...................................72-73

Fan Cover Assembly ..........................................74-75

Flywheel Assembly ............................................76-77

Mufﬂer Assembly ...............................................78-79

Fuel Tank Assembly ...........................................80-81

Ignition Coil Assembly .......................................82-83

Piston Assembly ................................................84-85

Recoil Starter Assembly ....................................86-87

Gear Reduction Assembly .................................88-89

Labels ................................................................90-91

Terms and Conditions of Sale — Parts ...................92

Component Drawings

Nameplate and Decals ......................................40-41

Frame Assembly ................................................42-43

Paddle Shaft Assembly ......................................44-45

Steel Drum Assembly ........................................46-47

Drum and Paddle Shaft Complete Assembly ....48-49

Axle Assembly ...................................................50-51

Engine Assembly ...............................................52-53

Electric Motor Assembly ....................................54-55

Cabinet Assembly ..............................................56-57

NOTE

STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10) — PAGE 5

STOW MS-93 MIXER — PARTS ORDERING PROCEDURES

When ordering parts,

please supply the following information:

❒ Dealer account number

❒ Dealer name and address

❒ Shipping address (if different than billing address)

❒ Return fax number

❒ Applicable model number

❒ Quantity, part number and description of each part

❒ Specify preferred method of shipment:

✓ FedEx or UPS Ground

✓ FedEx or UPS Second Day or Third Day

✓ FedEx or UPS Next Day

✓ Federal Express Priority One

✓ DHL

✓ Truck

Note: Unless otherwise indicated by customer, all

orders are treated as “Standard Orders”, and will

ship within 24 hours. We will make every effort to

ship “Air Shipments” the same day that the order

is received, if prior to 2PM west coast time. “Stock

Orders” must be so noted on fax or web forms.

STOW CONSTRUCTION EQUIPMENT

A DIVISION OF MULTIQUIP INC.

POST OFFICE BOX 6254 CARSON, CA 90749

888-252-STOW [888-252-7869] 310-537-3700

FAX: 310-537-1986 FAX: 800-556-1986

E-MAIL: stow@multiquip.com INTERNET: www.stowmfg.com

Here’s how to get help...

Please have the model and serial number on

hand when calling.

STOW MAIN OFFICE

18910 Wilmington Ave. 800-421-1244

Carson, CA 90746 FAX: 310-537-3927

Email: [email protected]

Internet: www.stowmfg.com

SALES DEPARTMENT

310-661-4242 Fax: 310-604-9237

877-289-7869 (877-BUY-STOW)

PARTS DEPARTMENT

800-427-1244 FAX: 800-672-7877

310-537-3700 FAX: 310-637-3284

SERVICE DEPARTMENT

800-421-1244 FAX: 310-537-4259

310-537-3700

TECHNICAL ASSISTANCE

800-478-1244 FAX: 310-631-5032

WARRANTY DEPARTMENT

800-421-1244, EXT. 279 FAX: 310-537-1173

310-537-3700, EXT. 279

Extra Discounts!

All parts orders which include complete part numbers and

are received by our automated web parts order system, or

by fax qualify for the following extra discounts:

Ordered Standard Stock orders

via orders ($750 list and above)

Fax 3% 10%

Web 5% 10%

Special freight allowances

when you order 10 or more

line items via Web or Fax!**

FedEx Ground Service at no charge for freight

No other allowances on freight shipped by any other

carrier.

**Common nuts, bolts and washers (all items under $1.00

list price) do not count towards the 10+ line items.

Place Your Parts Order Via Web or Fax

For Even More Savings!

(Domestic USA Dealers Only)

NOTE: DISCOUNTS ARE SUBJECT TO CHANGE

Direct TOLL-FREE access

to our Parts Department:

Toll-free nationwide — 800-427-1244

Toll-free FAX — 800-6-PARTS-7

(800/672-7877)

PAGE 6 — STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10)

STOW MS-93 PLASTER/MORTAR MIXER — SPECIFICATIONS

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reserve the right to amend these

speciﬁcations at any time without

notice.

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STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10) — PAGE 7

STOW MS-93 PLASTER/MORTAR MIXER — DIMENSIONS

Figure 1. Dimensions

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PAGE 8 — STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10)

Safety precautions should be followed

at all times when operating this equip-

ment. Failure to read and understand

the Safety Messages and Operating

Instructions could result in injury to

yourself and others.

FOR YOUR SAFETY AND THE SAFETY OF OTHERS!

This Owner's Manual has been devel-

oped to provide complete instructions

for the safe and efﬁcient operation of the

MQ Mikasa Model MT-84F tamping

rammer. Refer to the engine manufac-

turers instructions for data relative to its

safe operation.

SAFETY MESSAGE ALERT SYMBOLS

The three (3) Safety Messages shown below will inform you about

potential hazards that could injure you or others. The Safety Mes-

sages speciﬁcally address the level of exposure to the operator,

and are preceded by one of three words: DANGER,

STOW MS-93 MIXER — SAFETY MESSAGE ALERT SYMBOLS

NOTE

You WILL be KILLED or SERIOUSLY INJURED if

you DO NOT follow these directions.

You CAN be KILLED or SERIOUSLY INJURED if

you DO NOT follow these directions.

You CAN be INJURED if you DO NOT follow

these directions.

CAUTION

DANGER

WARNING

Lethal Exhaust Gases

HAZARD SYMBOLS

Potential hazards associated with the operation of a MT-84F

Tamping Rammer will be referenced with Hazard Symbols

which appear throughout this manual, and will be referenced

in conjunction with Safety Message Alert Symbols.

Engine exhaust gases contain poison-

ous carbon monoxide. This gas is color-

less and odorless, and can cause death

if inhaled. NEVER operate this equip-

ment in a conﬁned area or enclosed

structure that does not provide ample

free ﬂow air.

Gasoline is extremely ﬂammable, and

its vapors can cause an explosion if

ignited. DO NOT start the engine near

spilled fuel or combustible ﬂuids.

DO NOT ﬁll the fuel tank while the engine is running or

hot. DO NOT overﬁll tank, since spilled fuel could ignite if

it comes into contact with hot engine parts or sparks from

the ignition system. Store fuel in approved containers, in

well-ventilated areas and away from sparks and ﬂames.

Engine components can generate extreme

heat. To prevent burns, DO NOT touch

these areas while the engine is running

or immediately after operations. Never

operate the engine with heat shields or

heat guards removed.

ALWAYS wear approved respiratory pro-

tection when required.

Lethal Exhaust Gas Hazards

WARNING

Explosive Fuel Hazards

WARNING

Burn Hazards

WARNING

Respiratory Hazards

WARNING

Before using this rammer, ensure that the operating individual

has read and understands all instructions in this manual.

STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10) — PAGE 9

STOW MS-93 MIXER — SAFETY MESSAGE ALERT SYMBOLS

ALWAYS wear approved eye and

hearing protection.

NEVER operate equipment with covers,

or guards removed. Keep ﬁngers, hands,

hair and clothing away from all moving

parts to prevent injury.

Rotating Parts Hazards

CAUTION

Eye and Hearing Hazards

CAUTION

Other important messages are provided throughout this

manual to help prevent damage to your light tower, other

property, or the surrounding environment.

Equipment Damage

Hazards

CAUTION

ALWAYS disconnect the electrical power

cord from the electric motor when the

mixer is not in use and place the ON/OFF

switch in the OFF position.

Accidental Starting Hazards

CAUTION

PAGE 10 — STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10)

The following safety guidelines should always be used

when operating the STOW MS-93 mortar and plaster mixer:

GENERAL SAFETY

■ DO NOT operate or service this equip-

ment before reading this entire manual.

■ This equipment should not be operated

by persons under 18 years of age.

■ NEVER operate this equipment without proper protective

clothing, shatterproof glasses, steel-toed boots and other

protective devices required by the job.

■ High Temperatures – Allow the engine to cool before

adding fuel or performing service and maintenance func-

tions. Contact with hot! components can cause serious

burns.

■ The engine section of this mixer requires an adequate

free ﬂow of cooling air. NEVER operate the mixer in

any enclosed or narrow area where free ﬂow of the

air is restricted. If the air ﬂow is restricted it will cause

serious damage to the mixer

or engine and may cause

injury to people. Remember

the mixer's engine gives off

DEADLY carbon monoxide

gas.

■ ALWAYS refuel in a well-

ventilated area, away from sparks and open ﬂames.

■ ALWAYS use extreme caution when working with ﬂam-

mable liquids. When refueling, stop the engine and allow

it to cool. DO NOT smoke around or near the machine.

Fire or explosion could result from fuel vapors, or if fuel

is spilled on a hot engine.

■ NEVER operate the mixer in an explo-

sive atmosphere or near combustible

materials. An explosion or ﬁre could

result causing severe bodily harm or

even death.

■ Topping-off to ﬁller port is dangerous, as it tends to spill

fuel.

■ Stop the engine when leaving the mixer unattended.

■ Block the unit when leaving or when using on a slope.

■ Maintain this equipment in a safe operating condition at

all times.

DANGER

Failure to follow instructions in this manual may lead

to serious injury or even death! This equipment is to

be operated by trained and qualiﬁed personnel only!

This equipment is for industrial use only.

■ NEVER operate this equipment under the inﬂuence of

drugs or alcohol.

NEVER! start the engine or engage the paddle arms

when the drum is in the discharge (down) position.

WARNING

Read this manual!

Starting the Mixer Engine

■ NEVER touch the hot exhaust mani-

fold, mufﬂer or cylinder. Allow these

parts to cool before servicing engine

or mixer.

■ ALWAYS wear proper respiratory (mask),

hearing and eye protection equipment when

operating the mixer.

■ NEVER place hands inside the drum while the blades

are rotating.

■ Whenever necessary, replace nameplate, operation and

safety decals when they become difﬁcult read.

■ Manufacture does not assume responsibility for any ac-

cident due to equipment modiﬁcations.

■ NEVER use accessories or attachments, which are not

recommended by Multiquip for this equipment. Damage

to the equipment and/or injury to user may result.

STOW MS-93 PLASTER/MORTAR MIXER — RULES FOR SAFE OPERATION

■ NEVER operate this equipment when not

feeling well due to fatigue, illness or taking

medicine.

STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10) — PAGE 11

STOW MS-93 PLASTER/MORTAR MIXER — RULES FOR SAFE OPERATION

■ ALWAYS stop the engine before servicing, adding fuel

and oil.

■ NEVER run engine without air ﬁlter. Severe engine may

occur.

■ ALWAYS service air cleaner frequently to prevent carbure-

tor malfunction.

■ ALWAYS check the machine for loosened threads or bolts

before starting.

■ ALWAYS be sure the operator is familiar with proper safety

precautions and operations techniques before using mixer.

■ ALWAYS store equipment properly when it is not being

used. Equipment should be stored in a clean, dry location

out of the reach of children.

■ DO NOT operate this equipment unless all guards and

safety devices are attached and in place.

■ CAUTION must be exercised while servicing this equip-

ment. Rotating and moving parts can cause injury if

contacted.

■ When towing, an adequate safety chain must be fastened

to the frame. See Towing Guidelines section in this manual.

■ Keep all inexperienced and unauthorized people away

from the equipment at all times.

■ Unauthorized equipment modiﬁcations will void all war-

ranties.

■ Check all fasteners periodically for tightness. Also check

towing tongue bolt, lock nut and wheel lug nuts for wear.

■ Stop the engine and disconnect the spark plug before

allowing anybody’s hands in the mixing drum.

■ NEVER pour or spray water over the engine or electric

motor.

TRANSPORTING

■ ALWAYS shutdown engine before transporting.

■ Tighten fuel tank cap securely and close fuel cock to

prevent fuel from spilling.

■ Drain fuel when transporting mixer over long distances

or bad roads.

MAINTENANCE

■ NEVER lubricate components or attempt service on a

running mixer.

■ ALWAYS allow the mixer a proper amount of time to cool

before servicing.

■ Keep the mixer in proper running condition.

■ Fix damage to the mixer immediately and always replace

broken parts.

■ Dispose of hazardous waste properly. Examples of po-

tentially hazardous waste are used motor oil, fuel and

fuel ﬁlters.

■ DO NOT use food or plastic containers to dispose of

hazardous waste.

EMERGENCIES

■ ALWAYS know the location of the nearest ﬁre extin-

guisher and ﬁrst aid kit.

■ In emergencies always know the location of the

nearest phone or keep a phone on the job site.

Also know the phone numbers of the nearest

ambulance, doctor and ﬁre department. This

information will be invaluable in the case of an

emergency.

WARNING

Always stand clear of the dump handle when the mixer is

in operation. Any binding of material between the mixer

blades and the drum will cause the drum handle to quickly

move and could cause bodily harm.

■ Depending on type of mixer, test the ON/OFF switch for

either the gasoline engine or electric motor before oper-

ating. The purpose of these switches is to shut down the

engine or motor of the mixer.

■ Refer to the HONDA Engine Owner's Manual for engine

technical questions or information recommended by Mul-

tiquip for this equipment. Damage to the equipment and/

or injury to user may result.

Stand Clear of the

Mixer when in use

PAGE 12 — STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10)

STOW MS-93 PLASTER/MORTAR MIXER — SAFETY CHAIN CONNECTION

STOW MS-93 PLASTER/MORTAR MIXER — TOWING GUIDELINES

Towing Safety Precautions

Tow Bar to Vehicle Connection (Coupler Only)

1. Check the vehicle hitch ball, and mixer's coupler for signs

of wear or damage. Replace any parts that are worn or

damaged before towing.

To reduce the possibility of an accident while transport-

ing the mixer on public roads, always make sure that the

mixer towing components and the towing vehicle are in

good operating condition and both units are mechani-

cally sound.

CAUTION

If the mixer tow bar is deformed or damaged, replace the

entire tow bar. NEVER tow the mixer with a defective tow

bar. There exists the possibility of the mixer separating

from the towing vehicle.

CAUTION

The following list of suggestions should be used when tow-

ing the mixer:

■ Check with your county or state safety towing regulations

department before towing your mixer.

■ Make sure that the hitch and coupling of the towing vehicle

are rated equal to, or greater than the trailer "gross vehicle

weight rating" (GVWR).

■ ALWAYS inspect the hitch and coupling for wear. NEVER

tow the mixer with defective hitches, couplings, chains

etc.

■ CHECK the tire air pressure on both the towing vehicle

and the trailer. Also check the tire tread wear on both

vehicles.

■ ALWAYS make sure the mixer is equipped with a "Safety

Chain".

■ ALWAYS attach trailer's safety chain to the frame of tow-

ing vehicle.

■ ALWAYS make sure that the towing vehicle's directional,

backup, and brake lights are working properly.

■ Remember in most cases the maximum speed unless

otherwise posted for highway towing is 55 MPH, however

before towing your mixer, check your local state, and

county vehicle towing requirements. Recommended

off-road towing is not to exceed 10 or 15 MPH or less

depending on type of terrain.

■ Place chocked blocks underneath wheels to prevent roll-

ing, while parked, if disconnected from towing vehicle.

■ Inﬂate tires to correct pressure, inspect tires for cuts, and

excessive wear. See Table 9 (Tire Wear Troubleshooting).

■ When towing of the mixer is required, place the drum in

the up position (mouth facing upwards) and lock the drum

latch.

Regularly Inspect

Towing Components

Replacing

Towing Components

2. Use only a 2-inch ball diameter (towing vehicle), this will

match the mixer's 2-inch coupler. Use of any other ball

diameter will create an extremely dangerous condition

which can result in separation of the coupler and ball or

ball failure.

3. After tow bar has been connected to mixer (see next

page), attach mixer's coupler to the hitch ball on the

towing vehicle securely and make sure the lock lever

is in the down position (locked).

Mixer Tow Bar Vehicle Connection (Pintle and Loop)

1. Make sure the bumper on the towing vehicle is

equipped to handle either a pentle or loop type tow bar

conﬁguration.

2. After tow bar has been connected to mixer (see next

page), secure either type of tow bar to the towing vehicle,

following state and county towing regulations.

3. As a minimum, use a 1/2-inch bolt and nylock nut grade

5 when securing the tow bar to the towing vehicle and

to the unit being towed.

■ ALWAYS make sure that the fuel valve lever is in the OFF

position (gasoline models only).

■ Check wheel mounting lug nuts with a torque wrench.

Torque wheel lug nuts as described in the maintenance

section of this manual.

■ Check tightness of U-clamp nuts, torque suspension

hardware as referenced in the maintenance section of

this manual.

■ Avoid sudden stops and starts. This can cause skidding,

or jackkniﬁng. Smooth, gradual starts and stops will

improve gas milage.

■ Avoid sharp turns to prevent rolling.

STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10) — PAGE 13

STOW MS-93 PLASTER/MORTAR MIXER — SAFETY CHAIN CONNECTION

Reference Figure 2 for the installation of the safety chain.

Tow Bar to Mixer Connection

1. Insert the tow bar through the round opening at the

bottom of the mixer stand.

Align the hole on the tow bar with the hole on the mixer

frame, and insert 1/2-inch bolt through tow bar and frame.

Secure tow bar to frame with 1/2-inch nylock nut. Tighten

to 40 ft.-lbs.

2. Route the safety chain through the holes just above the

tow bar, located on each side of the mixer stand.

Loop the chain together and place under the tow bar.

Secure the loop with the connector link.

3. extend the safety chain along the length of the tow bar,

looping it through the tow bar's connector link. Remove

any excess chain slack.

4. Connect the free end of (clevis safety hook) the safety

chain to the towing vehicle. Remember it is critical that

the length of the chain be properly adjusted, to prevent

the draw bar and the front of the mixer stand from

dropping to the the ground (contact) in the event the

draw bar becomes disconnected from the towing vehicle.

Figure 2. Tow Bar and Safety Chain Installation

Figure 3. Drum Latch Pin

(Tow or Locked Position)

NEVER! tow the mixer with the safety chain removed. The

safety chain is intended to prevent complete separation

of the mixer from the towing vehicle in the event of a tow

bar failure.

CAUTION

DO NOT tow the mixer unless the mixing drum is com-

pletely empty. ALWAYS make sure the drum latch pin

is fully engaged to the right (Figure 3) of the drum stop

block. This will keep the drum from rotating.

CAUTION

Always Tow with

a Safety Chain

Drum Saftey

when Towing

PAGE 14 — STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10)

MS-93 PLASTER/MORTAR MIXER — OPERATION AND SAFETY DECALS

Machine Safety Decals

The STOW MS-93 mortar and plaster mixer is equipped with a number of safety decals. These decals are provided for operator

safety and maintenance information. Figure 4 below illustrates these decals as they appear on the machine. Should any of these

decals become unreadable, replacements can be obtained from your dealer.

Figure 4. Mixer Operation and Safety Decals

STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10) — PAGE 15

STOW MS-93 PLASTER/MORTAR MIXER — GENERAL INFORMATION

Application

The STOW MS-93 series mixers (drum capacity of 9.0 cu.

ft./263 liters) are shipped completely assembled and have been

factory tested and are ready for use.

This mixer is only intended for the production of plaster and

mortar. The mixer must be used for its intended purpose

and is not suitable for the mixing of ﬂammable or explosive

substances. The mixer must not be used in an explosive

atmosphere. This mixer has a batch capacity between 2-1/2

and 3-1/2 bags.

Power Plants

The STOW plaster and mortar mixer can be powered by

either a Honda GX240K1HA2 air-cooled, 4-stroke

gasoline

engine

or a 2 HP electric motor. Refer to Table 2 for speciﬁc

engine or electric motor data information.

Electrical

If mixer is equipped with an electric motor, make sure that

the power being supplied to the motor corresponds to the

voltage rating label on the motor. Supplying the wrong volt-

age to the electric motor will cause severe electrical damage

to the motor.

Always make sure the OFF/ON switch on the electric motor

is in the OFF position before applying power.

It is strongly recommended when inserting the mixer's

power cord into a receptacle, that a G.F.C.I. (Ground Fault

Current Interrupter) receptacle be used (115 VAC applica-

tions).

Extension Cables

The extension cable should be a 3-wire conﬁguration that

includes a ground wire that conforms to UL code. The wire

cross section must be a minimum of 2.5 mm

2

. Choose an

extension cord of adequate current carrying capacity as

referenced in Table 6. Remember cable distance affects

the current-voltage capacity of the extension cable.

Ensure that the extension cable is carefully laid out avoiding

wet areas, sharp edges and locations where vehicles might

run over it. Avoid allowing the extension cable to be trapped

underneath the mixer.

Unroll the extension cable fully or it will overheat and could

catch ﬁre. Make sure that all extension cable connections are

dry and safe. Replace any defective or badly worn extension

cable immediately.

Hardware

Check all hardware on the mixer before starting. Periodically

inspect all hardware. Loose hardware can contribute to

early component failure and poor performance. Use Table

4 as general guideline when torqueing of mixer hardware

is required. Remember to keep all mixer hardware compo-

nents tight.

Engine Maintenance

For basic engine maintenance, refer to the engine mainte-

nance section in this manual. For a more detailed engine

maintenance, refer to the Honda Engine Owner's manual

furnished with the engine.

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PAGE 16 — STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10)

STOW MS-93 PLASTER/MORTAR MIXER — BASIC MIXER COMPONENTS

Figure 5. Mixer Components

1. Tires Ply — The tire ply (layers) number is rated in letters;

This mixer uses 13-inch 4-ply tires.

2. Engine Cover — Lift this cover to gain access to the

engine compartment.

3. Belt Slip Lever — When starting this lever should be

move upward and to the left. For mixing place the lever in

the down position. See attached decal located adjacent

to lever.

4. ON/OFF Switch (electric) — This switch is provided on

mixers with electric motors. To gain access to this switch,

lift the engine cover. When activated it will shut down the

electric motor.

5. ON/OFF Switch (gasoline) — This switch is provided

on mixers with gasoline engines only and is located on

the side of the engine cover. When activated it will shut

down the engine.

6. Latch — Use this latch to secure the engine compart-

ment cabinet.

7. Drum Bearing — There is on each end of the mixing

drum, a sealed bearing. Bearings are packed and sealed

at the factory and require no further maintenance.

Figure 5 illustrates the basic components and controls of

the STOW MS-93 mixer

8. Mixing Paddles — Used in the mixing of material. This

unit uses four different types of paddles to provide a fast

uniform mix.

9. Bag Cutter— This feature allows compound mixing bags

to be opened easily, therefore allowing the contents of

the bag to fall directly into the mixing drum.

10. Safety Grill — Provided for operator safety. This safety

grill is designed to keep hands and solid objects out of

the mixing drum when in use. This grill should be closed

at all times when mixer is in use. DO NOT remove the

grill or grill opening bar. Keep the grill clean by washing

it down daily.

11. Dump Handle — Pull this handle downward to dump the

contents of the drum. Push the handle upward to return

the drum to its vertical position.

12. Safety Grill Lock Handle — To prevent injury to hands

and arms, the safety grill should ALWAYS be locked when

the mixing of plaster or mortar is required. Also when

transporting the mixer the safety grill should be locked.

The safety grill should only be un-locked when cleaning

of the blades and drum is required.

13. Pivot Point/Zerk Fitting — There is, on each end of the

mixing drum a zerk grease ﬁtting. These ﬁttings lubricate

the dumping mechanism. Lubricate both ﬁttings at least

twice a week.

14. Dump Handle Release Pin — Pull this pin outward

(spring loaded) to release the drum, then pull down on

the dump handle to place the drum in the dump position.

When drum is in dump position, pin will automatically lock

drum.

15. Steel Mixing Drum — Mixing materials such as mortar,

plaster are to be placed into this drum for mixing. Always

clean the drum after each use.

16. Tow Bar/Coupler — This mixer uses a 2-inch coupler

or pintle towbar.

17. Safety Chain — This mixer uses a 3/16-inch thick,

72-inches long zinc-plated saftey chain. ALWAYS con-

nect the safety chain when towing.

18. Forklift Pockets – When lifting of the mixer is required,

use these fork lift pockets to lift the mixer. Remember to

insert the forks of the forklift a minimum of 24 inches

into the lift pockets.

19. Chock Blocks — Place these blocks (not included as

part of the mixer package) under each mixer wheel to

prevent rolling.

STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10) — PAGE 17

STOW MS-93 PLASTER/MORTAR MIXER — BASIC ENGINE COMPONENTS

Figure 6. Engine Controls and Components

INITIAL SERVICING

The engine (Figure 6) must be checked for proper lubrication

and ﬁlled with fuel prior to operation. Refer to the manufactur-

ers Engine manual for instructions & details of operation and

servicing.

1. Fuel Filler Cap – Remove this cap to add unleaded gaso-

line to the fuel tank. Make sure cap is tightened securely.

DO NOT over ﬁll.

5. Fuel Valve Lever – OPEN to let fuel ﬂow, CLOSE to stop

the ﬂow of fuel.

6. Choke Lever – Used in the starting of a cold engine, or

in cold weather conditions. The choke enriches the fuel

mixture.

7. Air Cleaner – Prevents dirt and other debris from enter-

ing the fuel system. Remove wing-nut on top of air ﬁlter

cannister to gain access to ﬁlter element.

Operating the engine without an air

ﬁlter, with a damaged air ﬁlter, or a

ﬁlter in need of replacement will allow

dirt to enter the engine, causing rapid

engine wear.

Adding fuel to the tank should be done only

when the engine is stopped and has had an

opportunity to cool down. In the event of a fuel

spill, DO NOT attempt to start the engine until

the fuel residue has been completely wiped

up, and the area surrounding the engine is dry.

DANGER

2. Throttle Lever – Used to adjust engine RPM speed (lever

advanced forward SLOW, lever back toward operator

FAST).

3. Engine ON/OFF Switch – ON position permits engine

starting, OFF position stops engine operations.

4. Recoil Starter (pull rope) – Manual-starting method. Pull

the starter grip until resistance is felt, then pull briskly and

smoothly.

8. Spark Plug – Provides spark to the ignition system. Set

spark plug gap to 0.6 - 0.7 mm (0.028 - 0.031 inch) Clean

spark plug once a week.

9. Mufﬂer – Used to reduce noise and emissions.

10. Fuel Tank – Holds unleaded gasoline. For additional

information refer to engine owner's manual.

NOTE

WARNING

Engine components can generate extreme

heat. To prevent burns, DO NOT touch these

areas while the engine is running or imme-

diately after operating. NEVER operate the

engine with the mufﬂer removed.

Explosive

Fuel Hazard

Burn Hazard

PAGE 18 — STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10)

STOW MS-93 PLASTER/MORTAR MIXER — ELECTRIC MOTOR

Special attention should be given to the electric switch as

well as the over-and-under voltage protection devices as per

regulations set forth in the local electrical safety code handbook

NOTE

Figure 7. Single Phase Electric Motor With

12-inch Pigtail

Electric Motor

For maintenance care and operation of the electric motor,

refer to your electric motor instruction booklet furnished with

the motor.

Protect the electric motor from dust as much as possible and

keep ventilating openings clean.

DO NOT spray water at any time on the electric motor.

DO NOT operate electric motor in a explosive environment.

The electric motor used in this mixer is a single-phase 3

HP motor. The input voltage requirement for this motor is

115/230 VAC, and has been pre-set to 230VAC.

Electric Motor Connection

A 12-inch electrical cable (Figure 7) is provided with the elec-

trical motor for hookup to a power source. Table 5 shows the

required NEMA connector for the desired motor horsepower

rating. In addition, Table 5 also shows the matching NEMA

approved connector for the required extension cord.

CAUTION

ALWAYS make certain that the power source required for

the electric motor is correct and always use the correct

NEMA conﬁguration plug. Failure to supply the correct

voltage to the motor can severely damage the motor.

CAUTION

Electric Motor

Connections

Electric Motor

Safety

It is strongly recommended that all

electrical wiring be done by a licensed

electrician.

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STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10) — PAGE 19

Electric Motor Voltage Switch

1. ALWAYS make certain the motor switch is "OFF" and the

power cord has been disconnected from the power source.

2. Remove the voltage lock-out bolt (Figure 7). Change the

position of the voltage change toggle switch from 115

VAC to 230 VAC. The mixer is factory wired for 115 VAC

operation.

3. Replace the voltage lock-out bolt.

4. Important!, when changing the input voltage to the motor

from 115 to 230 VAC, the plug on the motor power cord

must also be changed. See Table 5.

The motor supplied is wired for 115 VAC grounded operation.

Make certain that the correct size grounded (3-wires) extension

cord is used. See Table 6.

Motors can burn out when the line voltage falls 10% below the

voltage rating of the motor. Failure to use proper voltage will

cause the motor to overheat and actuate the overload switch.

If overload protection should actuate because of improper volt-

age or any other malfunction, turn the main switch on the motor

to the "OFF" position and correct the problem, press the reset

switch button, and turn the main switch to the "ON" position.

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STOW MS-93 PLASTER/MORTAR MIXER — ELECTRIC MOTOR

PAGE 20 — STOW MS-93 MIXER — OPERATION MANUAL — REV. #5 (03/26/10)

Figure 8. Paddle Blade Adjustment, Steel Drum

Adjust paddles as shown in Figure 8.

STOW MS-93 — PADDLE BLADE ADJUSTMENT (STEEL DRUM)

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